... ,heating,etc. 4.Opening/closing tests:10000 time Features: Ball valve are bottom loaded stem designed, this anti-blow-out stem ... also prevents teampering With the internals of the valve when in the line. The ball valve have a double seal with elastic ... ,Malaysia, Greece, Sri Lanka,Syria,Tunisia,Mauritius,Algeria etc. brass ball valve/Lockable Ball Valves full flow/flat lever Handle/1/4"-4"